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Influence of La doping on the magnetic properties of the two-dimensional spin-gapped system SrCu(BO)
No full textDoping of the two-dimensional dimer antiferromagnet SrCu(BO) has long been proposed as a potential route toward realizing resonating valence bond superconductivity in this systemhowever, experimental progress has remained limited. This study explores the effects of La doping on the ground state of SrCu(BO) and reports the first flux growth of SrLaCu(BO) single crystals with nominal doping levels up to x = 0.15. Powder X-ray diffraction and energy-dispersive X-ray spectroscopy confirm the successful incorporation of La on the Sr sites within the same tetragonal I2m structure, although the effective doping was found to be <50% of the nominal concentration. La doping induces systematic changes in the magnetic properties of SrCu(BO), with a reduction of the effective spin gap from 28.2 K for the undoped sample to 20.3 K for x = 0.15, as determined from the low-temperature magnetic susceptibility. The X-band electron spin resonance measurements reveal the emergence of unpaired Cu spins, which develop antiferromagnetic correlations below ∼5.5 K. These findings corroborate the breaking of the local spin dimers in SrCu(BO) induced by La doping. No superconductivity is observed across the entire doping range studied
Mnenja študentov o problemskem učenju pri poučevanju angleščine za posebne namene v visokem šolstvu
No full textTo address the ever-increasing need for more learner-centred teaching approaches in higher education, a study was conducted to explore students’ perceptions of problem-based learning (PBL) in an English for Specific Purposes (ESP) course at the Faculty of Public Administration, University of Ljubljana. This was the first time students experienced this approach in their classes at the faculty. 73 responses to an open-ended question about PBL were analysed, applying text mining techniques conducted in the Orange software tool. First, the most frequent words and phrases expressed in students’ responses were determined and visualized using a word cloud. Next, sentiment analysis was carried out to identify the emotional tone behind the responses, further enhanced by an analysis based on Ekman’s model to discern dominant emotions. Finally, key themes were aligned with theoretical concepts of PBL and divided into positive and negative categories. More than 95% of students’ responses were overwhelmingly positive, expressing feelings of joy and high satisfaction with the new method. Even though students’ perceptions may be influenced by various factors, such as the quality of teaching, the rapport between the teacher and the students as well as the students’ background, the findings of this study suggest that PBL may be very effective in ESP teaching, particularly in the field of public administration. Learning evolves through solving real-life problems, providing ample opportunities to develop language skills relevant to students’ needs and future endeavours.Zaradi vse večje potrebe v visokem šolstvu po bolj prilagojenih pristopih k poučevanju je bila na Fakulteti za upravo Univerze v Ljubljani pri predmetu angleščina za posebne namene izvedena študija, katere namen je bil raziskati, kako študenti dojemajo problemsko učenje. Ta pristop je bil namreč na fakulteti v prvem letniku prvič uporabljen. Z uporabo tehnik rudarjenja besedil s programskim orodjem Orange je bilo analiziranih 73 odgovorov na odprto vprašanje o problemskem učenju. Poiskane so bile najpogostejše besede in besedne zveze, ki so vizualizirane z oblakom besed. Z analizo sentimenta je bil določen čustveni ton v odgovorih, ki ji je sledila še analiza prevladujočih čustev, povzetih po Ekmanovem modelu. Glavne teme so bile ob koncu usklajene s teoretskimi zasnovami problemskega učenja in razdeljene v pozitivno in negativno skupino. Več kot 95 % vseh odgovorov je bilo izrazito pozitivnih. Študentje so izrazili občutke veselja in bili z novo metodo poučevanja zelo zadovoljni. Čeprav na mnenja študentov lahko vplivajo različni dejavniki, kot so kakovost poučevanja, odnos med učiteljem in študenti ter predznanje študenta, ugotovitve pričujoče študije nakazujejo, da je problemsko učenje lahko zelo učinkovito pri poučevanju angleščine za posebne namene, še posebej na področju javne uprave. Učenje se odvija skozi reševanje življenjskih problemov in tako ponuja številne priložnosti, da študentje razvijejo jezikovne veščine, ki ustrezajo njihovim potrebam in ciljem v prihodnosti
Honest Design. The Sociological Aspect of Honest Design and the Role of the Graphic Designer
No full textMagistrsko delo preučuje vpliv grafičnega oblikovanja skozi sociološki okvir, kjer je oblikovanje, ki ga vidimo prek podob in oblik, del našega vsakdanjega življenja in predstavlja pomembno vlogo za razumevanje odnosov v družbi. Z upoštevanjem družbenega in kulturnega konteksta oblikovalskega dela lahko grafični oblikovalci učinkoviteje ustvarijo dela, ki so pomembnejša za ciljno občinstvo.
Ob vseprisotnosti oblikovanja se sprašujemo o njegovi relevantnosti in odgovornosti. Če je prisotno povsod, kakšna mora biti vizualna odgovornost materiala ter odgovornost grafičnih oblikovalcev (v nadaljevanju t.i. oblikovalcev) in naročnikov, da ostajajo etični (v nadaljevanju t.i. iskreni) do sebe, svojega dela in družbe. Grafično oblikovanje je poklic, ki najpogosteje deluje v oglaševanju in je močno prepleteno s kapitalom. Namen kapitala je njegova večja prepoznavnost in večji zaslužek, kar sta glavni karakteristiki neoliberalnega kapitalizma, z zelo malo iskrenosti in dobronamernosti. Obravnavali bomo vprašanje o odnosu med kapitalom in oblikovanjem ter kakšna je vloga kulturnih posrednikov. Pogledali si bomo pojem spektakla (Debord, 1967) in kako v sodobni družbi prevladujejo podobe, ki pogosto ustvarjajo umetne potrebe, da bi vsilile potrošništvo in s tem ponaredile družbeno življenje. V magistrski nalogi bomo preverjali, ali lahko v dobi globaliziranega kapitalizma obstaja iskreno grafično oblikovanje, kakšne so možnosti, etični pravilniki, kodeksi in zakoni. Cilj naloge je obravnavanje deficitarne sociološke vednosti na področju oblikovanja, njegove pomembnosti in vpliva na družbo.The master\u27s thesis examines the influence of graphic design through a sociological framework, where design, as seen through images and forms, is part of our everyday lives and plays an important role in understanding relationships in society. By taking into account the social and cultural context of design work, graphic designers can more effectively create works that are more relevant to their target audience.
Given the ubiquity of design, we must ask ourselves about its relevance and responsibility. If it appears everywhere, what is the visual responsibility of the material, what is the responsibility of graphic designers (referred to as designers) and clients to be ethical (referred to as honest) to themselves, their work, and ultimately to society? Graphic design is a profession that most often operates in advertising and is strongly intertwined with capital, the purpose of which is greater recognition and greater profit, which are the main characteristics of neoliberal capitalism, with very little honesty and good intentions. We will examine the relationship between capital and design and the role of cultural intermediaries. We will look at the concept of spectacle (Debord, 1967), and how contemporary society is dominated by images that create artificial needs, impose consumerism, and thus distort social life. In this master\u27s thesis, we will examine whether honest graphic design can exist in the age of globalized capitalism, what are the possibilities, and what ethical rules, codes, and laws exist. The aim of this thesis is to address the lack of sociological knowledge in the field of design, its importance, and its impact on society
Program za pridobitev potrdila o mikrodokazilu UL Upravljanje in svetovanje na področju varstva narave v kmetijstvu – osnovna raven
No full textAutomatic programming, testing and calibration system for electronic circuits
No full textMagistrsko delo obravnava razvoj celovitega sistema za avtomatsko
programiranje, testiranje in kalibracijo elektronskih vezij za sledenje in telemetrijo
plovil. Sistem je bil razvit za potrebe podjetja Sentinel Marine Solutions, kjer se letna
proizvodnja povečuje s 1000 na pričakovanih 5000 enot.
Razviti sistem omogoča sočasno testiranje dveh vezij, kar v praksi predstavlja
celotni panel iz proizvodnje, avtomatsko nalaganje programske opreme, testiranje
tokovne porabe, digitalnih in analognih vhodov, kalibracijo analogno-digitalnih
pretvornikov ter preverjanje jakosti GPS in GSM signalov. Implementirana je bila
modularna arhitektura, ki omogoča testiranje treh različic naprav (BM50, BM50 Lite,
BM50 Pro) z minimalnimi spremembami.
Sistem je bil uspešno uveden v proizvodnjo februarja 2024 in je do danes opravil
več kot 12.000 testov. Dosegel je visoko zanesljivost brez lažno pozitivnih rezultatov,
kar zagotavlja kakovost izdelkov in zmanjšuje stroške reklamacij.The master\u27s thesis discusses the development of a comprehensive system for
automatic programming, testing, and calibration of electronic circuits used for vessel
tracking and telemetry. The system was developed for the needs of the company
Sentinel Marine Solutions, where annual production is increasing from 1,000 to an
expected 5,000 units.
The developed system enables simultaneous testing of two circuits, which is an
entire production panel. It enables automatic software uploading, current consumption
testing, digital and analog input testing, analog-to-digital converter calibration, and
verification of GPS and GSM signal strength. A modular architecture was
implemented, allowing testing of three device versions (BM50, BM50 Lite, BM50
Pro) with minimal modifications.
The system was successfully deployed in production in February 2024 and has
completed more than 12,000 tests to date. It has achieved high reliability with no false
positive results, ensuring product quality and reducing warranty claim costs
Geoekonomsko pozicioniranje polperiferije
No full texthe article explains Slovenia’s geoeconomic positioning amid the intensifying US–China rivalry. Drawing on a critical political economy framework and the literature on growth models, the concept of geoeconomic exposure is introduced to illustrate how Slovenia’s export-led economy – particularly its reliance on the German automotive industry – influences foreign policy. The article reconstructs the emergent (and contradictory) push for government-supported ‘internationalisation’ of the Slovenian economy towards China spearheaded by the auto industry in search of diversification away from flailing German car giants and towards (Chinese) electric vehicle supply chains, thus shedding light on the elite’s strategising in the EU periphery.Članek razlaga geoekonomsko pozicioniranje Slovenije v kontekstu čedalje intenzivnejše tekmovalnosti med ZDA in Kitajsko. Temelječe na pristopu kritične politične ekonomije in literaturi o modelih rasti uvaja pojem geoekonomske izpostavljenosti, da ponazori, kako slovensko izvozno usmerjeno gospodarstvo – zlasti njegova odvisnost od nemške avtomobilske industrije – oblikuje slovensko zunanjo politiko. Članek rekonstruira porajajoči se (in notranje protislovni) premik v smeri vladno podprte »internacionalizacije« slovenskega gospodarstva v smeri Kitajske, ki ga vodi avtomobilska industrija v iskanju diverzifikacije stran od upehanih nemških avtomobilskih gigantov in v smeri (kitajskih) dobavnih verig električnih vozil, s čimer osvetljuje strategije vladajočih elit na obrobju EU
Habitat effects on the microbiome and ionome of selected hyperaccumulating pennycress species (Noccaea spp.)
No full textHiperakumulacijske rastline odlikuje toleranca in kopičenje sicer strupenih koncentracij (pol)kovin, vloga mikrobioma pri tem fenomenu pa še ni v celoti opisana. V Sloveniji uspevata dve vrsti, ki hiperakumulirata cink (Zn) in kadmij (Cd): Noccaea caerulescens in N. praecox. Obe vrsti uspevata na neonesnaženem rastišču v Lokovcu, vrsta N. praecox pa uspeva tudi na rastišču v Žerjavu, kjer so tla močno onesnažena s Zn, Cd in svincem (Pb). Namen raziskave je bil proučiti mikrobiom, transkriptom, metabolom in kopičenje Zn in Cd ter ugotoviti vpliv gostitelja in okolja na odzive rastlin v naravi in kontroliranih pogojih. Raziskava je obsegala dva sklopa poskusov: (i) naravne populacije obeh vrst z neonesnaženega rastišča ter vrsto N. praecox z onesnaženega rastišča in (ii) transplantacijski poskus, kjer smo semena obeh ekotipov vrste N. praecox posadili v lokovški in žerjavski substrat. Pri obeh poskusih smo vzorčili cele rastline, vključno s koreninami in rizosfero ter izvedli analize talnega mikrobioma, transkriptoma in metaboloma v listih ter določili koncentracijo in razporeditev Zn, Cd in Pb v listih. Pri naravnih populacijah se mikrobioma rizosfere in korenin obeh vrst, ki uspevata na neonesnaženem rastišču, nista razlikovala, medtem ko sta bila mikrobioma ekotipov vrste N. praecox taksonomsko in funkcionalno različna. Analiza transkriptoma in metaboloma v listih je pokazala izraženost genov in akumulacijo metabolitov povezanih z visokimi koncentracijami kovin v tleh, kot so metabolizem glutationa, biosinteza fenilpropanoida ter flavonoidov. Ugotovili smo, da je bila izraženost nekaterih genov in akumulacija določenih metabolitov bodisi vrstno bodisi okoljsko specifična. V transplantacijskem poskusu je presaditev na drugi tip tal povzročila spremembo v pestrosti in zastopanosti mikrobnih taksonov, predvsem v rizosferi. V onesnaženem substratu smo v listih lokovškega ekotipa izmerili večje koncentracije Zn kot v listih žerjavskega ekotipa, pri čemer so bile opazne tudi razlike v razporeditvi Zn po listih. Rezultati obeh poskusov kažejo na kompleksnost hiperakumulacije ter poudarjajo pomembno vlogo ekotipa za optimizacijo fitoremediacije.Hyperaccumulating plants are characterized by their tolerance and ability to accumulate otherwise toxic concentration of metal(loid)s, yet the role of the microbiome remains poorly understood. In Slovenia, two zinc (Zn) and cadmium (Cd) species occur naturally: Noccaea caerulescens and N. praecox, both of which grow at the non-metalliferous site in Lokovec, while N. praecox also occurs at the metalliferous site in Žerjav, polluted with Zn, Cd and lead (Pb). The aim of this study was to investigate the microbiome, transcriptome, metabolome, and metal accumulation, and to assess the effects of plant host and environment on plant responses under natural and controlled conditions. Two experimental approaches were used: (i) natural populations from non-metalliferous and metalliferous sites and (ii) a transplant experiment in which seeds of both N. praecox ecotypes were planted in Lokovec and Žerjav substrates. Whole plants, including roots and rhizosphere, were sampled for root-associated microbiome, leaf transcriptome and metabolome profiling, and determination of Zn, Cd and Pb in leaves. In natural populations, the root and rhizosphere microbiomes of the two species from Lokovec did not differ, whereas the microbiomes of N. praecox ecotypes were taxonomically and functionally distinct. The leaf transcriptome and metabolome analyses revealed genes and metabolites associated with high metal concentrations, including pathways involved in glutathione metabolism, phenylpropanoid and flavonoid biosynthesis, with species- and environment-specific patterns. In the transplant experiment, transfer to a different substrate led to changes in the diversity and relative abundance of microbial taxa, particularly in the rhizosphere. In the metalliferous substrate, higher Zn concentrations were measured in the leaves of the Lokovec ecotype compared to the Žerjav ecotype, and differences in the spatial distribution of Zn within leaves were also observed. The results of both experiments highlight the complexity of hyperaccumulation and emphasise the important role of ecotype selection for optimising phytoremediation
Nutritional practices and identities in fitness culture: a content analysis on Instagram and TikTok
No full textMagistrsko delo proučuje, kako vsebine na družbenih omrežjih Instagram in Tiktok soustvarjajo prehranske prakse ter oblikujejo identitetne pozicije znotraj fitnes kulture. Čeprav je vpliv družbenih omrežij na prehranske navade predmet številnih raziskav, se večina študij osredotoča na širše prehranske trende, na mladostnike kot ranljivo skupino ali na motnje hranjenja. Manj pozornosti pa je namenjene specifičnemu presečišču med fitnes kulturo, prehranskimi praksami in digitalnimi reprezentacijami, čeprav prav ta prostor zaznamuje sodobne diskurze o telesu, zdravju in življenjskem slogu. Premalo je raziskano, kako se ti procesi manifestirajo znotraj fitnes kulture, kjer se hrana razume ne le kot vir energije, ampak tudi kot sredstvo za doseganje estetskih ciljev, izražanje samodiscipline in signaliziranje statusa. Skozi teoretično raziskavo in izvedbo analize vsebine, rezultati kažejo, da prehranske prakse delujejo kot statusni označevalci, ki se prek platform pretvarjajo v simbolni kapital. V tem okviru delo osvetljuje načine, kako digitalne platforme prek vizualnih in besedilnih strategij vplivajo na oblikovanje prehranskih norm in identitetnih praks. Zaključek poudari pomen discipline, zdrave prehrane in implicitnega poudarka na telesu.The master\u27s thesis examines how content on social networks Instagram and Tiktok co-create dietary practices and shape identity positions within fitness culture. Although the impact of social networks on dietary habits is the subject of numerous studies, most studies focus on broader dietary trends, on adolescents as a vulnerable group, or on eating disorders. Less attention is paid to the specific intersection between fitness culture, dietary practices, and digital representations, although this space marks contemporary discourses about the body, health, and lifestyle. There is insufficient research on how these processes manifest within fitness culture, where food is understood not only as a source of energy, but also as a means to achieve aesthetic goals, express self-discipline, and signal status. Through theoretical research and content analysis, the results show that dietary practices act as status markers that are transformed into symbolic capital through platforms. In this context, the work sheds light on the ways in which digital platforms influence the formation of dietary norms and identity practices through visual and textual strategies. The conclusion emphasizes the importance of discipline, healthy eating, and the implicit gift of the body
Coupling anisotropic curvature and nematic order
No full textThis study theoretically investigates how anisotropic curved membrane components (CMCs) control vesicle morphology through curvature sensing, nematic alignment, topological defects and volume constraints. By comparing arc- and saddle-shaped CMCs, we identify a rich spectrum of steady-state phases. For fully CMC-covered vesicles, arc-shaped components drive a pearling-to-cylinder transition as nematic interactions strengthen, while on partially CMC-covered vesicles the saddle-shaped CMCs stabilize necks between the convex regions of bare membrane. We map the steady-state shapes of vesicles partially covered by arc- and saddle-shaped CMCs, exposing how different vesicle shapes depend on the interplay between nematic interactions and volume constraints, revealing several novel phases. By investigating the in-plane nematic field, we find that topological defects consistently localize to high-curvature regions, revealing how intrinsic and deviatoric curvature effects cooperate in membrane remodeling. These findings establish a unified framework for understanding how proteins and lipid domains with anisotropic intrinsic curvature shape cellular structures—from organelle morphogenesis to global cell shape
Microwave photonic techniques in phase-noise measurements of microwave sources
No full textMicrowave photonics has recently come to the forefront as a valuable approach to generating, processing, and measuring signals in high-performance domains such as communication, radar, and timing systems. Recent studies have introduced a range of photonics-based phase-noise analyzers (PNAs) that utilize a variety of architectures, including phase detection, frequency discrimination, and hybrid mechanisms that combine optical with electronic processing. This review focuses on microwave photonic techniques for phase-noise measurement based on the fiber-optic delay-line method, by exploring their fundamental principles, system design frameworks, and performance indicators. The fiber-optic delayline method is examined as the core architecture, due to the exceptionally low loss and wide bandwidth of the optical fiber, which enable long delays and high measurement sensitivity. Through the integration of insights garnered from recent publications, our objective is to deliver a comprehensive understanding of the strengths and limitations associated with fiber-optic delay-line-based PNAs and to pinpoint new and promising areas for advancing research in the field of oscillator metrology